96.30: An 800-kg elevator accelerates )i*o jxgg23jro/3jlh x*dfm0 downward at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

  98.29: A 50-kg student stands on a scale in an elevator. zh :h1j+1w7mr z,fx phx8 ;ypyAt the instant the elevator has a downward ac 7;,hpy1 hpyfz:zxx8w rh j+1mceleration of $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately

  07.13: Astudent weighing 500 N stands on a bathroom scale in the school’s5ndxtzgfgo k i e60tx:/cx 3wj1sz +mn* .q5,d elevator. When the scale reads 520 ct1nwg3x x, +0 d/zqmnf*s6gt5.:zkj5d eiox N, the elevator must be

  00.12: Astronauts in an orbiting at+864k )v;cvz sa yggb5og0v space shuttle are “weightless” because

  06.16: A scientist in the Internatiy 97.ge i1;oi; igvfcnonal Space Station experiences "weightlessness;cn.g foi7gii 1yv ;e9" because

  11.10: A string of negligible mass connects an object of mass M=10 rmdls152:oh) 4: hkqntl4yvg kg to the ceiling of an elevator. The elevator experiences a constant :l1 lomkvgh45) h dq4ntsyr:2downward speed of 3.0 m/s. Let Trepresent the magnitude of the force on the mass M by the string (tension), G represent the magnitude of the gravitational force by the Earth acting on the mass M hanging in the elevator, and F represent the magnitude of the net force acting on the mass M. Which one of the following choices describes the relationships between these forces?

  12.10: A string of negligible mass connects an objec gt+gpl i755vjt of mass M=10 kg to the ceiling of an elevator. The elevator experiences a constant downward acceleratioivgg5t 7jpl+ 5n of magnitude $6.0\; m/s^{2}$ . Let Trepresent the magnitude of the force by the string (tension) acting on the mass M, let G represent the magnitude of the gravitational force by the Earth acting on the mass M, and let F represent the magnitude of the net force acting on the mass M. Which one of the following choices describes the relationships between these forces?

  03.06: A 2 kg mass and a 4 kg mass on a horizontal frictionless surfacv( k5(l . llgea6m8ugve are connected by a massless string A. They are pulled horizontally across the surface bl8vlg glaeu6k 5. vm((y a second string B with a constant acceleration of $12\; m/s^{2}$ .
What is the magnitude of the force of string B on the 2 kg mass?

  03.07: A 2 kg mass and a 4 kg mass on a horizontal frictionless su*w2.,y*xu tavmx cr t 5*)iwcyrface are connected by a massless string A. They are pu*u* mtywt ca,x v5xi.*w2yc) rlled horizontally across the surface by a second string B with a constant acceleration of $12\; m/s^{2}$ .
What is the magnitude of the force of string A on the 4 kg mass?

  03.08: A 2 kg mass and a 4 kg mass on a horizontal frik2ruzq1w ou):u1cmrbhy4cqvi6t4n8 k b )r 6+ctionless surface are connected by a massless string A. They are pulled horizo8w4mu1y )q4rk 6i rv2uc 1 ozk6rcn):b+ bhqutntally across the surface by a second string B with a constant acceleration of $12\; m/s^{2}$ .
What is the magnitude of the net force on the 2 kg mass?

  96.33 : Two blocks X andY are in c6n- xwcb vv-)wontact on a horizontal frictionless surface. A 36 N constant force is appx)v vb-6cnww-lied to X as shown to the right. The force exerted by X onY is:

  97.31: Two blocks of mass 1.0 kg and 3.0 kg are connected by a string which ha(zk rcnvkv4s +uwqb .a4dby9m0s5 e(( s a tension of 2.0 N. A force F acts in the dirmzk 9(svew +d45vcb(b 0snu (r.4yqa kection shown to the right. Assuming friction is negligible, what is the value
ofF?

  99.12: Two boxes are accelerated to the right on a fricti/ na0uogkwj lx*f8jd6(ne 2l;onless horizontal surface as shown. The larger box has a mass of 9 kilograms and the smaller box has a mass of 3 kilograms. If a 24 newton horizontalf*l lj6gue0o adj;w 2/n8( xkn force pulls on the larger box, with what force does the larger box pull on the smaller box?

  17.15 : Two blocks X andY are in contbi2h 8qzzy hgwk)0 :(lact on a frictionless horizontal surface. A constant 35 N force is applied to the right onto block Y. What is the magnitude of th2 zhizq ky8):0gb(lwhe force that block X exerts onto blockY?

  94.25: One end of a massless rope is attachel0dpg-o:s 3 ndd to a mass m; the other end is attached to a mass of 1.00 kg. The rope is hung over sgnd0:o dl3-p a massless frictionless pulley as shown in the accompanying figure. Mass m accelerates downward at $5.0\;m/s^{2}$. What is m?

  97.30 : A string with masses of 1.5 kg and 3.0 kg on its ends q)vy1d;8fb9x.ep(d0gf 5e tt +lnhvtis hung over a frictionless, massless pulley as shown to the right. What is the approximate magnitude of the accelerati0fv x ttlpd1qvee+.8h;g)t d5y9b (nfon of the masses?

  02.36: Two masses, m1 and m2, are connected by a cord and arrafbq2/g6 wbt) gnged as shown in the diagram with m1 sliding along on a frictionless surface and m2 hanging from a light frictionless pulley. What b6gw )gtqf/b 2would be the mass of the falling mass, m2, if both the sliding mass, m1, and the tension, T, in the cord were known?

  02.42: A small box of mass m isplaced on;zuaq- qx .f8ys;o ji c6qz2z) top of a larger box of mass 2m as shown in the diagram at right. When a force F is applied to the large box, both boxes accelerate to the right with the same acce.c )xuqzyqq2j-az;6;s8 fio z leration. The coefficient of friction between all surfaces is μ , what would be the force accelerating the smaller mass?

  17.25: A box slides with uniform acceleration up an incline. The box has an initifc,vpl,c/ xbjq45 g 7adszwk7 +yv/(ial speed of 9.0 m/s and rises vertically 2k zw(d7,qv+gcvxclf /,jp/sb5 4ya i7.60 before coming to rest. If the angle of the incline is$30^{\circ}$, what is the coefficient of kinetic friction between the box and the incline?

  05.44: A box of mass mis initially at rest on a horizontaljov87wr ni2/:+rm h mc surface. A constant horizontal force of mg/2 is applied to the box, directed to the right. The coefficient of friction of the surface changes with the distance pushed as jiv wr87om 2:c mrhn/+$μ = μ_0x$ where x is the distance from the initial location. For what distance is the box pushed until it returns to rest?

  15.24: A mass on a frictionless incline has a gravrp6.ff f8jm,vce x(1)rb 7pf xitational force,a normal force from the incline, and a force applied by a person that all are equal in magnitude. The mass remains at rest and the incline makes an angle θ counterclockwise from the horizovbpx 7mr8jx6r ,fefcff( 1. p)ntal. Which one of the following choices best describes the orientation of the applied force by the person? The +x-axis is directed upward, parallel to the incline’s surface as shown in the figure.